Our very own Jim S has misters on his Marathon Cruise Airs. He has a pressure switch on the high side and when the Cruise Air pressures reach a specific value the misters spray onto his condenser coils, dropping the pressure. A very simple and elegant set up.

I believe Steve Bennet has modified the fans in his Marathon to push more air across the condenser coils.

The point is that the key to good Cruise Air operation when on the highway is to make certain the cooling efficiency of the condenser is not compromised and if needed get more cooling across the coils. But before anyone starts to re-engineer their coaches the first step should be to pay attention to what Jack Finch has done, and that is to optimize the performance. Cruise Airs are very sensitive to the correct freon charge and if set up with the right charge their performance will be very good. If I remember on my old coach (haven't had to touch the Cruise Airs on my current one) as little as an ounce one way or another makes a big difference.